[PATCH] ARM: dts: samsung: exynos4210-i9100: Fix Bluetooth node

[Paul Cercueil <paul@crapouillou.net>]

The BCM4330 is connected using CTS/RTS too, so add the 'uart-has-rtscts'
property.

Also add the missing 'max-speed' property and set it to 4 Mbps, which is
the maximum baud rate supported by this Bluetooth chip.

This fixes extremely choppy audio when connected to a Bluetooth speaker.

Fixes: 8620cc2f99b7 ("ARM: dts: exynos: Add devicetree file for the Galaxy S2")
Cc: stable@vger.kernel.org # v5.8+
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
 arch/arm/boot/dts/samsung/exynos4210-i9100.dts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/boot/dts/samsung/exynos4210-i9100.dts b/arch/arm/boot/dts/samsung/exynos4210-i9100.dts
index 8a635bee59fa..96db40102adb 100644
--- a/arch/arm/boot/dts/samsung/exynos4210-i9100.dts
+++ b/arch/arm/boot/dts/samsung/exynos4210-i9100.dts
@@ -875,11 +875,14 @@ &serial_0 {
 	status = "okay";
 
 	pinctrl-names = "default";
+	uart-has-rtscts;
 	pinctrl-0 = <&bt_en>, <&bt_res>, <&uart0_data>, <&uart0_fctl>;
 
 	bluetooth {
 		compatible = "brcm,bcm4330-bt";
 
+		max-speed = <4000000>;
+
 		shutdown-gpios = <&gpl0 4 GPIO_ACTIVE_HIGH>;
 		reset-gpios = <&gpl1 0 GPIO_ACTIVE_LOW>;
 		device-wakeup-gpios = <&gpx3 1 GPIO_ACTIVE_HIGH>;
-- 
2.53.0